Search results

Sort By:

Limit search:

Giant Magnetoresistance in Melt-Spun Co-Cu Modified by Rare Earths

100%

Idzikowski B., Rössler U., Handstein A., Nenkov K., Müller K.

Acta Physica Polonica A

2000

vol. 97

issue 5

791-794

Samples of the composition RE_{x}Co_{20}Cu_{80-x}, RE = Sm, Gd or Dy (x = 0, 1, and 3) were produced by melt-spinning and subsequent annealing. The magnetoresistance is negative as in granular Co-Cu, but its values depend on the kind of rare earth element added and on changes in the microstructure induced by thermal annealing. An addition of 1 at.% rare earth metal to Co_{20}Cu_{80} yields a considerable increase in the magnetoresistance ratio, whereas an addition of 3 at.% causes a decrease. E.g., by addition of 1 at.% Dy to Co_{20}Cu_{80} and optimal thermal treatment, the value of magnetoresistance ratio measured at 10 K in a field of 5 T increases from -14% to -28%. The effect can be attributed to the presence of clusters of hexagonal Dy(Co,Cu)_{5}, which was ascertained from X-ray diffraction data, or other, metastable rare-earth compounds and paramagnetic rare-earth atoms in the Cu matrix.

Refine search results

1 Acta Physica Polonica A

1 2000

1 Handstein A.

1 Idzikowski B.

1 Müller K.

1 Nenkov K.

1 Rössler U.

Search results

Giant Magnetoresistance in Melt-Spun Co-Cu Modified by Rare Earths